MySQL - next / previous ID wih cycling

Question

I need to create previous / next functionality with cycling. My current solution, If I select MAX(ID) gives next as NULL.

How can I most e

Answer 1

for next and previous id for the current foto you can do like this

SELECT COALESCE((SELECT id FROM `foto` WHERE id<'$this->id' ORDER BY DESC id LIMIT 1),
       (SELECT  MAX(id) FROM `foto`))  AS `prev`,
       COALESCE((SELECT id FROM `foto` WHERE id>'$this->id' ORDER BY id LIMIT 1 ),
       (SELECT MIN(id) FROM `foto`)) AS `next`

Hope it works fine for your needs